Changeset 13943

Timestamp:

Jul 8, 2010, 9:08:20 PM (14 years ago)

Author:

R. Matthew Emerson

Message:

When we get EXC_ARITHMETIC in catch_exception_raise(), translate a
code of EXC_I386_DIV (1) to FPE_INTDIV (7).

This apparently worked by luck before because FPE_FLTDIV happens to
be 1, and the error callback looked for either FPE_FLTDIV or
FPE_INTDIV.

This change also causes the lisp to enter the kernel debugger right
away when foreign code does an integer /0 (before the change, we would
attempt to invoke the error callback, which got confused.)

(This is all Darwin-specific, of course.)

File:

• trunk/source/lisp-kernel/x86-exceptions.c (modified) (1 diff)

trunk/source/lisp-kernel/x86-exceptions.c

@@ -3369 +3369 @@
       case EXC_ARITHMETIC:
         signum = SIGFPE;
+        if (code == EXC_I386_DIV)
+          code = FPE_INTDIV;
         break;